Archive Logging - Siemens SICAM Manual

Device Functions
4.1 Description
Overcurrent Alarm and Overcurrent Warning
Overcurrent warning and overcurrent alarm is applicable to phase current I
The overcurrent alerts are enabled if the system current exceeds the user-defined setting (I
Warning) and persists for a user-defined time (overcurrent alarm time/overcurrent warning time).
The overcurrent warning and overcurrent alarm resets when the current falls below the threshold with a
hysteresis of 5 % of rated primary current. For example, if the warning threshold is set to 500 A, the device
resets the alert if the current falls below 485 A for a rated primary current of 300 A (15 A is 5 % of 300 A).
For more information about the overcurrent alarm and overcurrent warning, see
Fault Parameters > Overcurrent Warning and Overcurrent Alarm menu.
NOTE
i i
Configure the overcurrent threshold for current settings (I
between the 2 settings is at least 10 % of the rated primary current to display an appropriate alert for an
alarm or warning.
NOTE
i
i
Configure the overvoltage threshold for voltages (V
threshold for voltages (V
2 % of the rated primary voltage to display an appropriate alert for an alarm or warning.
NOTE
i
i
If you set the threshold for an undervoltage alarm (V
voltage alarm (V
frequency change occurs (> 0.2 Hz), a false indication of the undervoltage alarm, undervoltage warning,
overvoltage alarm, and overvoltage warning can occur.
NOTE
i
i
The overvoltage alarm/warning resets after a delay of 10 s when the voltage falls below the configured
threshold. The undervoltage alarm/warning resets after a delay of 10 s when the voltages are above the
configured threshold or below 50 % of the primary voltage.

Archive Logging

4.1.38
An archive log is composed of:
•
Event logs
The device stores 20 faults as event logs on the non-volatile memory. The event logs consists of time
stamps and fault current values. The event log is designed as a ring buffer where the new fault always
overwrite the oldest stored event.
Due to the watchdog timer reset, the Device Error Event is also saved. For the device error event, in
Modbus the Current values are shown as 0. In HMI, the message Device error watchdog timer reset is
displayed without showing the phase-current values.
•
Trailing pointers
The minimum and maximum values of current are archived every 15 minutes, 30 minutes, 45 minutes, 1
hour, 24 hours, 1 month, and 1 year.
For more information about the parameters of archive logging, see
Trailing Pointers menus.
58
Alarm/V Warning) such that the difference between the 2 settings is at least
min min
Alarm), and overvoltage warning (V
max
, I , and I
1 2
Alarm/I Warning) such that the difference
max max
Alarm/V Warning) and the undervoltage
max max
Alarm), undervoltage warning (V
min
Warning) closer to the primary voltage and if a
max
Table A-1 and refer to the Events and
SICAM, Feeder Condition Monitor, Manual
E50417-H8940-C580-A4, Edition 03.2019
only.
3
Alarm/I
max max
Table A-4 and refer to the
Warning), over-
min